Ah yes. But the point is that the ATI player can seek through the file whilst WMP can't.

That's true, I think I had forgotten that That is puzzling

*edit*
At the least, is there something that I could do with, maybe, TMPGEnc, to re-encode the files to the type that can be FF'd through? I'd rather not use Virtualdub, as I've never been fond of that program (although the last time I used it was in a pretty primitive state).

Also, can TMPGEnc cut out parts of a file when it's re-encoding like inserted credits and such?